Means and method for recording photographic sound records



May 5, 1931. F. H. OWENS ,3

MEANS.AND METHOD FOR RECORDING PHOTOGRAPHIC SOUND RECORDS Filed Sept. 17, 1928 AMfLlF/lb INVENTOR. l Q. Fen-MAN hf Out/vs.

' BY I I ATTORNEY rmntea. Mei 5,1931

UNITED. STA

' r- I. ems,

or If. ,in' I I My inyention relates to a means-and method for recording photographic sound records. and has for its primary object a method -for recording sound upon photographie film 'us-' 6i La source of light of constant'intensity.

Anotlier object of. my invention is to pro-;

vi d'e' a; means 'andmethod for modulating the Iight 'rays ,paging nfrom a constant/source t o;l;the photographic iilm, by means of an adjjustableslit through'whichsuclfilight passes. if Other objects and 'advanta es in details or form and construction will e ap arent' as the description roceeds, reference going had to thejfigures oi the accompanyingd g 1 formin'ga part of this application and wherein like reference numerals indicate like parts. ,In, the drawing Figure lis a diagrammatic illustration of my invention certain apparatus being shown in section-and broken away for clearness."

Fi re 2 is a/detaiL-front view-oi the adjus'ta 1e slit member.

Fi M63 is a detail grap icfilmgate. v

In carrying out my invention, I provide the lamp 1 of constant intensity, the light rays of which are caught and focused upon .a

slit 3, said slit being adjustable and variable x as will be presently described. The light rays, passing'throu h the slit 3,are caught by the lenses 4 and ocused upon an opemng 7 if a suitable film gate 8, through which is adapted, to be moved L sired manner, a strip of photographic film 9, whereby the light rays willbe photographed upon such film to form asmind record. The I sli.t ;.3 isiormed by two overla'lpping plates 10 and'-1 1,'each prbvide d centre. y with cutout ortions 12,?and 13, whereby to provide the slit 3; between them. One or both of the 7 plates 10' and 11; may be adjustablewhereby to varythejsize fofwthe slit'3 and consequent; ,l the amountgof light passing therethrough'. uiddstraps' 'l serve to properly. guide the plates 10 and 11 in their sliding movement or adjustment. One end f the platelO is provided with, a in connectiontllj to adiaphragm 16, the vii'zation of whih' iscontrolled b amplified sound originating in a microp one'17, or

front view of the photo in anygsuitable or-de- {slit 3 will vary Application filed September 1928. im SOBjA M' other suitable device; and amplifiedby any suitable amplifier. 18. Thedetails of these umts have been omitted,- as they form no part j of this invention ez'zc'ept in combination here inafter claimedx; .Suflice it to say that the i8 sound waves are converted into-. electri c"1m "pulses, amplified, and such impulses result in vibrations of the diaphragm :16 in=accordanoe with the original sound waves.'..:The vibra tion of the diaphragm 16 obviously causes the plate lO-to slide in its guide toward and away from the plate 11-, thus adjusting or controls l-ing'Ithe size of the slit 3 in accordance with the soundiwaves. 3 o 1 I Y 1 ,As before stated, if desired theplate 11 for 83 instance can remain stationary and'the slit adjustment accomplished by' the, movement of the plate '10 in the manner just described.

It is entirely feasible however and in many instances preferable; that the both lates 10, '76 andll are oscillated oradjusted or regulatingthe size ofthe slit 3. Therefore; a pin connection 19 is provided between-the endof the plate 11 and a diaphragm 20 is served by the microphone 21 and amplifier 22.-- Obvlously, therefore, as the sound produced in the 'mlcrophones 17 and 21-- vibratesthe diaphragms 16 and 20 synchronously,-the plates 10 and ll' will be osclllatedtoward and away from each other and the size of the slit 3 will '80 I vary in' accordance with the diaphragm vi brationsn Thus the light passing through the and be modulated in accord ance with the sound-waves causing thevibration of the diaphragm Resultant photois graphic records on the film 9 will accurately represent the original sound waves. 1 k It should be here stated that if desired, instead of two microphones and am lifi'ers being'used,'-the output could b-divi edbetween the diaphragms *16 mean. Obviously, many other changes in details of form and arrangement may be made without depart- 4 ing from the spirit and scdpe of my invention. -'-I do not limit myselfvthereforeato the 06 exact form herein shown and described other than by the appended claims. v Iclaimz- W V 1.. Means for recording photographic sound records comprising a light source-of GI p as constant-intensity, a slit variable as to size thru which the light from. said source is adapted to pass, a plurality of electromagnetically operated means associated with a plurality of plates respectively for varying the size of said slit in accordance with the sound to be recorded, and means for photographing the modulated light rays from said variable slit on a sensitized film.

2. Means for recording photographic sound records comprising a light source of constant intensity, a slit variable as to size thru which the li ht from said source is adapted to pass, sai slit including two plates independently movable to vary the ewe of said slit, electromagnetically' controlled diaphragms having connections to said plates respectively, -whereby the size of said slit is varied in accordance with the sound to be recorded, and means for photographingthe modulated light' rays from said slit on asensitized film. l 1

3. Means for recording 7 photographic sound records comprising a li ht source, of constant intensity, a slit varia le as to size thruwhich the light from said source is adapted to pass, sald slit includin a pair of overlapping plates movable towar and away from each other to vary the size of said slit, a pair of individual electromagnetically controlled diaphragms connected to said plates respectively, whereby the size of said slit is varied in accordance with the sound to be recorded, and means for photographing the modulated light rays from'said variable slit on a sensitized film. v

4. Means for photographically recording sound-comprising in combination a source of luminous energy, a light sensitive film, a pair of overlapping plates providing an aperture for admitting said energy to said-film, said plates independently movable for varying the ph sical dimensions of said aperture and indivi ual electromagnetic means assoclated with said plates for actuating said plates respectively.

5. Means for photographically recordin sound comprising in combination a. source 0 luminous energy, a light sensitive film, a

pair of 'overlapping plates providing an.

aperture for admittmg said energy to said film, said plates independently movable for varying the hysical dimensions of said aperture, indivi ual electroma eticjmeans associated with said plates or actuating said plates respectively, and' individualenergizmgncircu ts for said electromagnetic means.

testimony whereof, I afiix my si ature. FREEMAN H. 0 NS. 

